| Massama to Orbetello | 1,101.56 mi (1,772.79 km) |
| Massama to Oria | 1,431.42 mi (2,303.64 km) |
| Massama to Oristano | 956.53 mi (1,539.38 km) |
| Massama to Orta Nova | 1,328.86 mi (2,138.60 km) |
| Massama to Orte | 1,161.22 mi (1,868.80 km) |
| Massama to Ortona | 1,263.07 mi (2,032.72 km) |
| Massama to Orvieto | 1,149.13 mi (1,849.34 km) |
| Massama to Orzinuovi | 1,083.12 mi (1,743.12 km) |
| Massama to Osimo | 1,224.42 mi (1,970.51 km) |
| Massama to Ospitaletto | 1,092.95 mi (1,758.94 km) |
| Massama to Ostuni | 1,427.78 mi (2,297.78 km) |
| Massama to Ottaviano | 1,265.13 mi (2,036.03 km) |
| Massama to Ovada | 1,007.14 mi (1,620.84 km) |
| Massama to Ozieri | 978.45 mi (1,574.67 km) |
| Massama to Paceco | 1,180.67 mi (1,900.10 km) |
